Antiskid device



Sept' 8, 1931. R. J. DUNHAM 1,822,616

ANTISKID DEVICE Filed April 2s, 195o l ,g ,6 r

Y A gwoentot Patented Sept. 11931 PATENT OFFICE REX J. DURHAM, F MILWAUKEE, 'KISUIJON'SNl N'rrsxrn DEVICE Application led April 28,

This invention relates to improvements in anti-skid devices of the type employed on motor vehicles.

The primary object of the invention is to provide an antiskid device having detachable traction increasing caulks ada ted to be removed from the cross members o the tractiondevice when the fcaulks have become worn.

A further object of this invention is to pro,

vide a device of the'above mentioned character com rising a cross member adapted to be secure to the tread of a vehicle tire by means of fastening chains or the like whereby vibration in the present 'day anti-skid devlces 1s overcome. l

n A still further. object of this invention is to provide an anti-skid device having cross numbers extending diagonally across the treadof the tire and having removable ground engaging faces whereby the same may be reversed when worn to a smooth surface.

A still furtherobject of this invention is to provide an anti-skid device having antiskid cross link members with hardened steel ground engaging inserts which may well last a considerable length of time.

Other objects and advantage, .if the invention will become apparent during the course of the following description of the drawings forming a part of this specification and in which:

Figure 1 is a plan view of the anti-skid device showing the arrangement of the ground engaging links and the manner of connecting the same to the retaining side chains;

Figure 2 is a top elevational view of one of the ground engaging cross members disconnected from the retaining chains;

Figure 3 is a side elevational view of the ground engaging member showing the retaining lugs for receiving the retaining chains or cables; l

Figure 4 is a longitudinal.perspective viewof one of the hardened steel inserts removed from ythe cross-link;

Figure 5 is alongitudinal perspective view of one of the cross links showing the hardcned steel insert removed;

1930. Serial No. 446,868.

Figure 6 is a transverse cross sectional view of the cross link taken on line 6-6 of Figure 3 showing the manner of removably holding the hardened steel insert in position in the cross link;

Figure 7 is a transverse cross-sectional view taken on line 7-7 of Figure 4 illustrating the tongues on the sides of the hardened steel inserts; and

Figure 8 is a transverse cross sectional view 50 taken on line 8 8 of Figure '5 showing the longitudinal cut away portion for receiving the hardened steel inserts. l

For a more'detailed description ofthe invention, reference is had to the drawings wherein the reference character 10 will generally be used to designate a cross link'of an anti-skid device. The cross link 10 is provided with ears 11, having openings 12, for

receiving retaining chains 13. As illustrated y in Figure 1, the'cross links 10, extend in a diagonal relation across the tread of a tire y and are held' thereon by the conventional type of side chains 14. The inner ends of the cross links 10 are connected together by con- 75 necting links 15, while longitudinal anti-skid links 10 may connect the junctures of the inner ends of the diagonal cross links 10, by meansof connecting links 13.

As illustrated in Figures 2 to S inclusive 80 the cross link 10 is formed with integral side ribs 16, extending longitudinally of the link andhaving longitudinally extending grooves 17 formed in the inner walls 18. The tread engaging face of the'cross links10 is formed 85 with an angular face 21 for preventing slippage ofthe links on the tire tread. A

Each of the hardened metal inserts 19, is provided with a ground engaging face 20, which maybe roughened or as illustrated in the drawings, to prevent skidding of the wheel upon which the anti-skid device is attached. .A pair of oppositely extending tongues 21 are formed integral on the longitudinal side walls of hardened metal insert 19, for -being received in grooves 17 of the i cross link 10.

The hardened metal insert is adapted to slide longitudinally into. the cross link 10 and between the side walls 16 thereof and is 100 held against removal by the connecting chains passing through the opening 12, in the ears 11.

' It is to be understood that wire cables may be employed for connecting the cross links to- 5 gether and for securing the links to the tread of a vehicle tire.

It is also to be understood that various changes in the shape, size and arrangement of parts upon the tread of a vehicle tire may .10 be resorted to without departing from the spirit of the invention or the scope of the subjoined claims. V

Having thus described the invention what is claimed is 1. An antisskid device of the characterdescribed, comprising an elongated cross link, ears formed on the ends of each cross-link havingl openings for receiving a retaining member. a hard metal insert carried by the cross-link, whereby the same may be removed or reversed when Worn, and means for retaining the removable insert in place. 2. An anti-skid device of the character described, comprising an elongated grooved cr0ss-link havingears at opposite ends thereof, an insert carried by the cross-link in the `grooved portion thereof, said insert being ot a harder metal than the Cross-`link` and means for fastening the cross link to the tread of a vehicle tire, said means also formingr a retainer for the hard metal insert.

In testimonyywhereof I affix my signature.

REX J. DUNHAM.

till 

